I have had one for 3 years and I love it. I am upgrading to the new Mach 4 this year. I also have had good results with the Trophy Ridge Drop Zone but if I had to choose, I have had better results with the Trap Door. I have seen notations on other web sites that the trap door can be hard to set up but I have not made an adjustment since I bought it. My shop must have done it right in the beginning.